Vertical lightleaks

[Joao]

I was testing a Yashica Elecro GSN and a Konica C 35; I shot several frames with the Yashica, rewinded the film, loaded it int the Konica, shot some blank frames and then I used the camera as usual until the complete film was exposed . Film was Eastman Double X, hand-spooled exposed at ISO 400 and developed in paRodinal. Some vertical lightleaks showed in most of the frames (from both cameras) but not in all of them. Photos here
http://www.flickr.com/photos/joaofreitas/12421278695/in/photostream/
http://www.flickr.com/photos/joaofreitas/12421759134/in/photostream/
http://www.flickr.com/photos/joaofreitas/12421430293/in/photostream/
Could this be due to a problem with the cannister or with the spooling of the film ?? Or are there other possible explanations ??
Thank you in advance for your opinions
Regards
Joao

 

[Monochrom]

it´s imposible to tell since you used two cameras!

There are many possible reasons for this, i think you´ll have to focus in one camera at a time and only then get into develiping problems.

good luck

 

[Steve M.]

Yep, the two camera thing throws everything off, but it's unlikely that two different cameras would have the same light leaks. So it's probably a loading issue. Nowadays, if I need to test two cameras, I shoot 16 images or so of a 36 exp roll, put the camera in a change bag and open it, unroll the exposed part, cut it, and load it into a developing tank that's already in the bag. Then I shoot the remainder of the roll in the second camera. Works fine. That's plenty of exposures to test a camera or lens.